The number 345,000 has 3 significant figures because the trailing zeros are not significant since there's no decimal point.
<h3>What is significant figures?</h3>
Significant figures of a number in positional notation are digits in the number that are reliable and necessary to indicate the quantity of something.
Also significant figures can be defined as, the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value.
Examples of significant figures;
- 405 = 3 significant figures
- 405000 = 3 significant
- 0.040500 = 5 significant figures
<u>Note:</u> leading zeros are not significant but trailing zeros, which are zeros at the end of a number, are significant only if the number has a decimal point.
345,000 = 3.45 x 10⁵ (3 significant figures)
Thus, the number 345,000 has 3 significant figures because the trailing zeros are not significant since there's no decimal point.
Learn more about significant figures here: brainly.com/question/24491627
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Scientist rely on their estimates when they cannot obtain on exact numbers
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Meaning you have to give heat to the system (ex. tea) in order to get e.g. the sugar dissolved :) However, in extreme cases heat can also be released!
As a covalent bond is a bond between atoms sharing electrons, a polar covalent bond is a covalent bond where the difference in electronegativity of the two atoms is uneven (one is greater than the other). This meaning that one atom will have a greater pull on the electrons towards them than the other and the share of electrons is uneven (definition of polar). A non polar covalent bond is one where the difference in E.N is small or non existent and the balance of shared electrons is even
